2.4.0.82112100 - Disclosure - Long-Term Stock Incentive Plantruefalsefalse1false falsefalseD2013Q2YTDhttp://www.sec.gov/CIK0000051548duration2012-12-01T00:00:002013-05-31T00:00:001true 1us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Disclosure of Compensation Related Costs, Share-based Payments [Abstract]2false 2us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:12px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">9. Long-Term Stock Incentive Plan</font></div><div style="line-height:120%;padding-top:6px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In May </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2013</font><font style="font-family:inherit;font-size:10pt;">, the Company awarded and issued a total of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">80,514</font><font style="font-family:inherit;font-size:10pt;"> restricted shares of the Company&#8217;s Class&#160;A common shares to certain officers and managers, under the Company&#8217;s Long-Term Stock Incentive Plan (the &#8220;2006 Plan&#8221;). The shares of restricted stock awarded in May </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2013</font><font style="font-family:inherit;font-size:10pt;">, vest at the rate of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">50.0 percent</font><font style="font-family:inherit;font-size:10pt;"> on the third anniversary of the award date and the remaining </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">50.0 percent</font><font style="font-family:inherit;font-size:10pt;"> on the fifth anniversary of the award date. The weighted average grant date fair value of these restricted share awards was </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$32.87</font><font style="font-family:inherit;font-size:10pt;"> per share. In accordance with ASC 718, &#8220;Compensation &#8212; Stock Compensation&#8221; the Company is recognizing stock-based compensation on its restricted shares awarded on the accelerated method over the requisite service period.</font></div></div>falsefalsefalsenonnum:textBlockItemTypenaThe entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65, A240 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 93-6 -Paragraph 53 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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